Electrical connections, Control and safety devices

42VMC

Electrical connections

E N G L I S H

Jumper positioning:

Units are equipped with a jumper inside the electric control box, to make them suitable for the two installation typologies:

Wall vertical installation: jumper inserted.

Ceiling horizontal installation: jumper removed.

To reset incorrect jumper positioning, proceed as follows:

•Disconnect the power supply.

•Reposition the jumper correctly.

•Connect the power supply.

IMPORTANT:

•Make refrigerant connections before electrical connections.

When disconnecting, disconnect electrical connections before refrigerant connections.

•Make ground connection prior to any other electrical connections.

The mains supply must be connected as follows: Models 42VMC 009, 012, 014: to the indoor unit. Models 42VMC 018, 024: to the outdoor unit.

•Make electrical connections between units prior to proceeding to mains supply unit connection.

•Before proceeding with the unit connection to the mains supply locate live L and neutral N, then make connections as shown in the wiring diagram.

•Ensure that mains supply connection is made through a switch that disconnects all poles, with contact gap of a least 3 mm.

•The indoor - outdoor unit connecting wires must be A07 RN-F type (or higher), with synthetic rubber insulation with Neoprene coating, according to EN 60335-2-40 and HD277.S1 codes.

•The mains supply connecting cable for 42VMC 009, 012, 014 units, must be H07 RN-F type (or higher), with synthetic rubber insulation with Neoprene coating, according to EN 60335-2-40 and HD277.S1 codes.

•Ground connection between indoor and outdoor unit is made via the refrigerant pipes.

•With the cable clamp supplied, secure the connecting cable between the two units.

•Fasten the electric connecting wires with refrigerant tubes together. Allow an additional length to the electric wires for easy connection to the unit connectors.

Notes:

•For sizing of power supply wires and delay type fuses, refer to the outdoor unit installation instructions.

•All field electrical connections are the responsibility of the installer.

IMPORTANT:

The units are provided with electronic control.

A time-delay device provides a 3 minute starting delay of the compressor every time the unit is stopped or when it is initially switched on.

Control and safety devices

The following control and safety devices are built into the indoor units (see wiring diagrams):

•Room air thermostat adjustable from 18°C to 32°C.

•Motor with overheat/overcurrent protection.

GB - 9